arm: Remove duplicate entries in isr_attribute_args [PR target/57002]

Remove two duplicate entries in isr_attribute_args ("abort" and
"ABORT").

2020-04-30  Christophe Lyon  <christophe.lyon@linaro.org>

	PR target/57002
	gcc/
	* config/arm/arm.c (isr_attribute_args): Remove duplicate entries.

gcc/ChangeLog

+2020-04-30  Christophe Lyon  <christophe.lyon@linaro.org>
+
+	PR target/57002
+	* config/arm/arm.c (isr_attribute_args): Remove duplicate entries.
+
 2020-04-30  Andreas Krebbel  <krebbel@linux.ibm.com>
 
 	* config/s390/constraints.md ("j>f", "jb4"): New constraints.

gcc/config/arm/arm.c

@@ -3925,8 +3925,6 @@ static const isr_attribute_arg isr_attribute_args [] =
   { "fiq",   ARM_FT_FIQ },
   { "ABORT", ARM_FT_ISR },
   { "abort", ARM_FT_ISR },
-  { "ABORT", ARM_FT_ISR },
-  { "abort", ARM_FT_ISR },
   { "UNDEF", ARM_FT_EXCEPTION },
   { "undef", ARM_FT_EXCEPTION },
   { "SWI",   ARM_FT_EXCEPTION },